[CMake] FindBoost.cmake from 2.6

[Fernando Cacciola]

Doug Gregor wrote:
> On Thu, Jul 3, 2008 at 6:33 PM, Fernando Cacciola
> <fernando.cacciola at gmail.com> wrote:
>> OK, I found the problem today.
>> The version is parsed (from version.hpp) into a variable named
>> Booist_MAJOR_VERSION (et al)
>> But the comparison code incorrectly uses Boost_VERSION_MAJOR.
>> (Haven't tryed the latest patch though, just the "official" 2.6)
>
> Ah, right. We fixed this in CMake CVS. There were some other issues
> with the version-checking logic, too, that have been fixed.
>
Ha yes, it needs to compare the minor version only when the major equaled 
(and so on). Yea, I had to fix that too.

>> No, sorry, I was clear enough because my example code was wrong though. I
>> meant that this:
>>
>> I tried *this* version of FindBoost with 2.4.7 and 2.4.8 and it just 
>> works
>> :) with one exception: the version number in the find_package command is
>> ignored prior to 2.6.
>> But, that exception doesn't matter in practice becasue you can 
>> redundantly
>> store the minimum required version manually in vairables of the form
>> Boost_FIND_VERSION etc, like this:
>>
>> set( Boost_FIND_VERSION 1.33.1 )
>> set( Boost_FIND_VERSION_MAJOR 1 )
>> set( Boost_FIND_VERSION_MINOR 33 )
>> set( Boost_FIND_VERSION_PATCH 1 )
>>
>> find_package(Boost 1.33.1 REQUIRED thread whatever )
>>
>> that code works in 2.4.7, 2.4.8 and 2.6 as far as I tested it. And in all
>> cases with the same FindBoost.cmake (the one we are discussing)
>
> Okay. You'll need some minor tweaks to use this module with CMake <
> 2.6.1, because of the use of the HINTS argument to find_path et al.
> However, it's a simple tweak.
>
Right.

Thanks

Fernando